Pressure-exerting tool



Oct. 22, 1929.

s. s. cou- PRESSURE EXERTING TOOL Filed Nov. 7. v1927 2 sheets-sheen 2v.ATTORNEY Patented Oct. 22, 1929 UNITED STATES SAMUEL S. COLT, OFORANGE, JERSEY 'rnnssunn-nxnnrrive Toor.

Application filed November 7, 1927. Serial No. 231,458.

This invention relates, generally, to a tool for exerting, at the willof the user, either pushing or pulling pressure, to perform suchoperations as the setting up of slidable ele- Y ments on supportingrods, shafts, or the like,

when it is required to forcibly move said elements into a desiredoperative position, or to pull rods, shafts or the like from theirsettings, or for any similar work `wherein the exertion of eitherpushing or pulling force is required.

The invention has reference, more particularly, to a novel pressureexerting tool for use in setting up or forcing home the clamp-collars oftie-rods employed in binding concrete form walls in operative assembledrelation, or for use in pulling tie-rods and the like out of concrete,etc., when dismantling forms.

The present invention has for its principal V"2o obj ect to provide asimple and easily actuated construction of pressureexerting tool forgeneral use and for the special uses above referred to, which comprises,broadly, a thrustblock or sleeve, a gripping means adapted to 25 betemporarily locked on a tie-rod, shaft or the like, and a power exertinglever interconnected between said thrust block or sleeve and saidgripping means.

Other objects of this invention, not at this 3o time moreparticularlyenumerated, will be clearly understood from the following detaileddescription of the saine.

The present invention is illustrated in the accompanying drawings, inwhich e5 Figure 1 is a transverse vertical section through a concreteform showing a tie-rod extending therethrough to bind the side walls ofthe form in assembled relation, said tie-rod having a clamp-collarthereon, and one forni 4o of the novel tool embodying the principles ofthe present invention being shown in side elevation in operativerelation to the tie-rod and clamp-collar ready for manipulation to setup the latter; Figure 2 is a similar view, but with parts of the tool inlongitudinal section, and

Figure 3 is a top plan view of the tool as shown in Figure l.

Figure 4 is a view similar to that shown in Figure 1 but illustrating amodified form and 50 construction of pressure exerting embodying theprinciples of this invention, and Figure 5 is a top plan view of thesame.

Similar characters of reference are employed in the hereinabovedescribed views, to e indicateA corresponding parts. 5d

Referring first tothe type of tool construction illustrated in Figures 1to 3 inclusive, the reference character 6 indicates the side walls of aconcrete form andy 7 a tie-rod extending therethrough to secure thesamein operative assembled relation. One end ofthe tie-rod is provided witha nut 8 to forma stop to engage the tie-rod with a wall 6 at one side ofthe form. The opposite end 7 of the tie-rod extends in outwardprojection beyond the exteriory face of the wall 6 at the other side ofthe form. Slidably disposed on the free end portion 7 of said tie-rod isa clamp-collar 9, preferably provided at its inner end with a ange 10 tofurnish a broad bearing for en-'70 gagement with the adjacent side wall6 of the form. Said clamp-collar is preferably provided with set-screws11 threaded into and through opposite sides thereof, as shown in `Figure3. The clamp-collar, in practice, is

forced tightly home lonthe tie-rod to abut the exterior face of theadjacent wall of the concrete form, whereupon the set-screws 11 areturned into biting engagement with the tierrod to retain theclamp-collar in operative 80 holding relation to said form wall. Thetool of the instant invention serves to apply the requiredforce to theclamp-collar to tightly set upthe saine, and at the same time draw thetie-rod so as to also set up the stop-nut 8 in 85 .tighlt holdingrelation to the opposite form -wal The novel tool of this inventioncomprises a thrust block 12 preferably in the form of a sleeve having alongitudinal bore 13 to re- 90 ceive the free end 7 of the tiered,whereby the block or sleeve may be positioned behind the clamp-collar 9to be set up. Said block or sleeve 12 is provided with an exteriorperforate ear or lug 12. The reference char- 95 acter'lt indicates agripping block also provided with an opening 15 to receive the free end7 of the tie-rod so that the gripping block may be fixed on the tie-rodvbehind the 'thrust block or sleeve 12. lSaid gripping 100 block 14 isprovided at its upper end porwhich is preferably integrally ly from saidgripping block is a handle eX- tension 17. Said gripping block isfurther provided, preferably in connection with itsl ower end portion,with a pair of perforate bearing members 18 to hold a cross-pin 18 topivotally mount an eccentric locking cam 19 having a manipulating'handlemember 20. Said locking cam 19 is arranged to enter sidewise into t-hebore or opening 15 of the gripping block and so as to be engageablc withthe tie-rod extending through the latter, whereby, at will, the grippingblock may be immovably locked to the tie-rod in stationary relationthereto. The biting face of said locking cam 19 may be provided withteeth 21 if desired to increase the frictional holding engagementthereof with the tierod. The reference character 22 indicates apower-exerting lever member provided at its lower end with a bifurcatedportion to receivefthe' fulcrum arm 16 of the gripping block to whichpivotal connection is made by the fulcrum pin or bolt 23. The lower endof said power exerting lever 22 is pivotally `connected with theperforate ear 12 of the thrust block or sleeve 12'by a pivot pin or boltExtending upwardly from the upper end of said lever member 22 is asuitable lever handle 25.

In operating'the form of tool above described to set up a clamp-collaronV the tie- .rod in tight holding engagement with a Ylorm wall, thethrust block or sleeve 12 and Vgripping block 14 are slid upon thetie-rod to position the thrust sleeve behind the Vclamp-collar', and thegripping block 14 is moved to a position which will cant forward thelever member 22 and its handle, whereupon the gripping block 14 islocked to the tie-rod so as tol provide a purchase for the operation ofthe lever member Vto produce thrusting movement of the thrust block orsleeve 12. When the tool, with ,its parts thus initially disposed, is inplace, the operator grasps and pulls upwardly on the handle 17 and.grasps and swings rearwardly the lever handle 25 to turn the levermember 22 on its fulcrum pin or bolt 28. such operation the lower 'endof the lever member 22 is swung Vforwardthereby exerting a powerfulforward thrusting moven'ient of the thrust block or sleeve 12 againstthe clamp-collar with the double effect of both drawing the tie-rod 7outwardly to tightly seat the stop-nutS against one wall oi the formwhile at the same .time sliding tightly home the clamp-collar 9 againstthe other wall oi the `form; at the same time the upwardly pullingpressure exerted on the handle 17 counteracts downward pressure on thetie-rod, which might otherwise tend to bend the same. By properlypositioning the parts of the tool on the tie-rod, the lever handle 25may be drawn or swung back substantially parallel to the handleextension 17 of the gripping block 14, so that the operator may graspboth such parts with one hand to thus hold the toel in clamp-collarsetting position, and so thatv one hand of vthe operator remains free tomanipulate the set-screws 11 to lock said clamp-collar in the operative'set up position to which it has been moved by the describedmanipulation of the tool. It may be desirable to furnish the tool withmechanical means for holding the same in pressure exerting position.@ney form of mechanical means adopted to such purpose is alsoillustrated in Figures 1 to 3 of the drawings, and consists in a notchedquadrant 26 suitably secured to the gripping block 14 to lie adjacent tothe path of op-` erative movement of said lever member 22, and thelatterV member is provided on a side adjacent tov said quadrant with apiveted detent pawl 27 to engage the notches of said quadrant wherebythe lever member 22r isl quent to the pouring of the concrete struc-`ture Yfor which the form is designed. lvVhen making such use ofthe'tool., theV gripping block 14 is locked on the tie-rod with thethrust block or sleeve 12 Vabutting` the clampcollar -9. The set-screws11 of lthe ciampcollar are relaxed to release the latterlrelative to thetie-rod, and the stop-nut 8 is removed from the opposite end of saidtievrod. When Vthe parts are thus prepared and adjusted, the operatorpulls rearward the lever member 22 by means of a lever handle 25,thereby causing the thrust block or sleeve Ato thrust against theimmovable clamp-collar for purchase while at the same time the swing ofthe lever member 22 transmits an outward pulling pressure to the tierodthrough the gripping block .14,v thus withdrawing or pulling out thelatter from the concrete.. These operations may be repeated to effect astep by step withdrawing vmovement of the tie-rod,l as will be obvious.Referring now to Figures 4 and 5 ofthe drawings, I have shown therein asomewhat modified form ofrtool which embodies, however, the generalprinciples of construction and mode of operation upon which the presentinvention is based. In this modified construction I provide a thrustblock or sleeve 28 having a longitudinal boreto receive the tie-rod end7 and also having a perforate lug or ear 29. The gripping block is inthe form of a sleeve or collar 30 also provided with a bore to receivethe tie-rod end, and having in operative connection therewith thepivoted eccentric locking cam 3l for temporarily locking the grippingblock to the tie-rod. The lever member 32 is pivotally Connected withthe forward end of the gripping block by means of links 33, which havetheir forward ends respectively disposed on opposite sides of the levermember, and operatively connected with'the latter by a fulcrum pinor-,bolt 34 while their rearward ends are pivotally connected with thegripping block by a pivot pin 35. The rearward end of one of said links33 may be rearwardly extended to provide a handle extension 36. Thelower end of said lever member 32 is pivotally connected with theperforate ear 29 of said sleeve 28 by a pivot pin or bolt 37, and saidlever member 32 is also provided with an upwardly extending lever handle38 for actuating the same. In general the manner of operating and usingthe above described modified form of tool is substantially the same asabove set forth in connection with the rst described construction, bothto produce pushing or pulling pressures.

The novel forms of pressure exerting tool hereinabove described providevery effective means for purposes in view, and in operation sodistribute the strains consequent upon their operation that risk ofbending the tierods or otherwise producing distortion thereof iseliminated, while at the same time permitting the exercise of requiredforcenecessary to the results sought.

While I have shown in the accompanying drawings and described in theforegoing specification, as well as pointed out in the annexed claims,certain novel features of the present invention, it will be understoodthat various omissions, substitutions and changes .v in forms anddetails of the devices illustrated and described may be made withoutdeparting from the spirit of the invention as comprised within the termsof the appended claims.

I claim:

1. A pressure exerting device for use in connection with rods and ttingsmounted thereon, confiprisinga thrust block slidable on the rod, agripping block receivable on the rod, said gripping block having arearconnection with rods and fittings mounted thereon, comprising athrust block slidable on the rod, a gripping block receivable on therod, said gripping block having a pivoted eccentric locking cam to lockthe same to the rod, and a power exerting lever member pivotallyconnected with said gripping block and having an end thereof pivotallycoupled with said thrust block.

3. A pressure exerting device for use in connection with rods andfittings mounted thereon, comprising a thrust block slidablc on the rod,a gripping block receivable on the rod, said gripping block having apivoted eccentric locking cam to lock the same to the rod, a fulcrum armprojecting forwardly from said gripping block, a power exertinglevermember pivoted on said fulcrum arm, means for pivotally connectingan end of said lever member with said thrust block, and a lever handleextending from the opposite end of said lever member.

4. A pressure exerting device for use in connection with rods andfittings mounted thereon, comprising a thrust block slidable on the rod,a gripping block receivable on the rod, said gripping block having apivoted eccentric locking cam to lock the same to the rod, a fulcrum armprojecting forwardly from said gripping block, said gripping blockhaving a rearwardly projecting handle extension, a power exerting levermember pivote@L on said fulcrum arm, means pivotally connecting an endof said lever member with said thrust block, and a lever handleextending from the opposite end of said lever member.

In testimony that I claim the invention set forth above I have hereuntoset my hand this tth day of November, 1927.

SAMUEL S. COLT.

